Enhanced THz absorptance of metal surfaces structured with femtosecond laser

Author

Vorobyev, Anatoliy Y. ; Topkov, Alexander N. ; Gurin, Oleg V. ; Svich, Vasily A. ; Guo, Chunlei

Author_Institution

Inst. of Opt., Univ. of Rochester, Rochester, NY

fYear

2008

fDate

Sept. 29 2008-Oct. 4 2008

Firstpage

416

Lastpage

418

Abstract

We show that THz absorptance of metals can be significantly increased by structuring the surface of metals with 1D array of parallel grooves produced by a scanning femtosecond laser beam. In our study, we enhance the absorptance of titanium up to 51% at wavelength of 70 mum (4.2 THz) even without optimization of the surface structure. This our finding shows that femtosecond laser surface structuring technology is suitable for creating highly absorptive metal materials for a variety of terahertz and submillimeter waves applications including terahertz spectroscopy, THz sensing, THz stealth technology, and space astronomy.

Keywords

high-speed optical techniques; laser materials processing; submillimetre waves; surface structure; terahertz waves; titanium; 1D array; Ti; enhanced THz absorptance; highly absorptive metal materials; metal surfaces; scanning femtosecond laser beam; submillimeter waves; surface structuring technology; terahertz waves; wavelength 70 mum; Inorganic materials; Laser beams; Optical arrays; Optical materials; Space technology; Submillimeter wave technology; Surface emitting lasers; Surface structures; Surface waves; Titanium; absorptance; femrosecond laser; metals; terahertz radiation;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Optoelectronics and Lasers, 2008. CAOL 2008. 4th International Conference on

Conference_Location

Crimea

Print_ISBN

978-1-4244-1973-9

Electronic_ISBN

978-1-4244-1974-6

Type

conf

DOI

10.1109/CAOL.2008.4671991

Filename

4671991